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Generalized concatenated CPFSK modulation

By: Ugrelidze, N.; Shavgulidze, S.; Bossert, M.; Hautle, A.;

1998 / IEEE / 0-7803-4408-1


This item was taken from the IEEE Conference ' Generalized concatenated CPFSK modulation ' Using the principles of generalized concatenation we introduce a new design for encoded M-ary CPFSK systems with modulation index h=1/M. This technique is based on a set partitioning method of inner CPFSK into nested subsystems with increasing free Euclidean distance. The subsystems are combined with several outer convolutional codes having different error-correcting capabilities. We describe a multistep decoding algorithm of generalized concatenated encoded CPFSK and give simulation results. The comparison of the generalized concatenated codes with the best known trellis-coded CPFSK schemes is also presented.